U.S. BUILDERS OF LARGE SHIPS
Since WWI, 80 U.S. shipbuilders have built the larger types of oceangoing vessels, including naval ships and submarines, cargo ships, passenger ships, other special-purpose commercial or governmental ships, and offshore drilling rigs.  All have (or had) a significant record of performance, involving more than a few years and more than a few ships.  The table below is structured in three groups: (A) 5 yards - the "big five" - which are actively building most of the U.S. Navy's large commissioned ships and submarines; (B) 15 yards - the "second tier" - which are actively building commercial ships, rigs and/or oceangoing government ships that are smaller and less expensive than those built by the "big five"; (C) 60 yards which have built significant numbers of large vessels since WWI but which are no longer active.
Group A - Major Active Builders of Large Naval Vessels (5)
#	Shipbuilder	Builder Since	Location	State
1	GD/Bath Iron Works	1890	Bath	ME
2	GD/Electric Boat	1899	Groton	CT
3	GD/NASSCO	1944	San Diego	CA
4	HII/Ingalls Shipbuilding	1939	Pascagoula	MS
5	HII/Newport News Shipbuilding	1886	Newport News	VA
Group B - Other Active Builders of Large Vessels (15)
#	Shipbuilder	Builder Since	Location	State
1	Austal USA	2000	Mobile	AL
2	Bollinger Lockport	1953	Lockport	LA
3	Bollinger Marine Fabricators (formerly McDermott SB)	1962	Amelia	LA
4	Bollinger Houma (formerly Gulf Island Fabricators)	2009	Houma	LA
5	Chouest North American Shipbuilding	1974	Larose	LA
6	Chouest LA Ship (formerly North American Fabricators)	1996	Houma	LA
7	Chouest Tampa Ship (formerly Tampa Shipyards, Tampa Bay SB)	2008	Tampa	FL
8	Fincantieri Bay Shipbuilding (formerly Christy Corp., Sturgeon Bay SB)	1885	Sturgeon Bay	WI
9	Fincantieri Marinette Marine	1942	Marinette	WI
10	Halter Marine Pascagoula (formerly VTHM Pascagoula)	1998	Pascagoula	MS
11	Halter Marine Offshore (formerly FGO Pascagoula)	1998	Pascagoula	MS
12	Keppel AmFELS (formerly Marathon LeTourneau)	1971	Brownsville	TX
13	Philly Shipyard (formerly Aker Phila., Kvaerner Phila.)	2000	Philadelphia	PA
14	Vigor Seattle (formerly Todd Seattle)	1890	Seattle	WA
15	Vigor Portland (formerly Port of Portland, Cascade General, US Barge)	2005	Portland	OR
Group C - Builders of Large Vessels Which Have Closed Since World War I (60)
#	Shipbuilder	Last Build	Location	State
1	Alabama Shipyard (formerly ADDSCO, Atlantic Marine Alabama, Alabama SY, BAE Systems SE)	2006	Mobile	AL
2	Albina Engine & Machine Works	1971	Portland	OR
3	American Bridge	1981	Ambridge	PA
4	AmShip Buffalo (formerly Buffalo Dry Dock)	1958	Buffalo	NY
5	AmShip Chicago (formerly Chicago SB)	1958	Chicago	IL
6	AmShip Cleveland (formerly Globe Iron Works)	1945	Cleveland	OH
7	AmShip Detroit (formerly Detroit SB)	1920	Detroit	MI
8	AmShip Lorain (formerly Cleveland SB)	1981	Lorain	OH
9	AmShip Toledo (formerly Craig SB)	1981	Toledo	OH
10	AmShip Superior (formerly American Steel Barge and Superior SB)	1919	Superior	WI
11	Avondale Shipyards	2006	New Orleans	LA
12	Bender Shipbuilding (formerly Bender Welding)	2009	Mobile	AL
13	Bethlehem Beaumont (formerly Pennsylvania SY)	1994	Beaumont	TX
14	Bethlehem Elizabethport (formerly Crescent SY)	1926	Elizabethport	NJ
15	Bethlehem Key Highway (formerly Baltimore DD & SB)	1974	Baltimore	MD
16	Bethlehem Quincy (formerly Fore River SB, later GD Quincy)	1983	Quincy and Squantum	MA
17	Bethlehem San Francisco (formerly Union Iron Works)	1981	San Francisco and Alameda	CA
18	Bethlehem San Pedro (formerly Southwestern SB)	1946	San Pedro	CA
19	Bethlehem Sparrows Point (formerly Maryland Steel)	1999	Sparrows Point	MD
20	Bethlehem Staten Island (formerly Staten Island SB)	1958	Staten Island	NY
21	Bethlehem Wilmington (formerly Harlan & Hollingsworth)	1926	Wilmington	DE
22	Butler Shipbuilders, Inc. (formerly McDougall-Duluth)	1945	Duluth	MN
23	Cramp Shipbuilding	1945	Philadelphia	PA
24	Defoe Shipbuilding (formerly Defoe Boat & Motor Works)	1976	Bay City	MI
25	Delaware River Iron SB (Roach's Shipyard, formerly Reaney, Son & Archbold, later Merchant SB)	1922	Chester	PA
26	Dravo Pittsburgh - Self-Propelled Vessels and Dravo Pittsburgh - Barges	1982	Pittsburgh	PA
27	Dravo Wilmington (formerly Harlan & Hollingsworth, Bethlehem Wilmington)	1965	Wilmington	DE
28	Federal Shipbuilding Kearny	1947	Kearny	NJ
29	Federal Shipbuilding Newark	1947	Newark	NJ
30	Great Lakes Engineering Ashtabula	1946	Ashtabula	OH
31	Great Lakes Engineering Ecorse	1960	Ecorse	MI
32	Gulf Shipbuilding (formerly Chickasaw SB, later Halter Chickasaw)	1982	Chickasaw	AL
33	Gulfport Shipbuilding (formerly Gulfport Boiler & Welding Works)	1982	Port Arthur	TX
34	Ingalls Iron Works	1981	Decatur	AL
35	Lake Torpedo Boat Co.	1922	Bridgeport	CT
36	LeTourneau Inc. (formerly Marathon LeTourneau)	2011	Vicksburg	MS
37	Levingston Shipbuilding	1982	Orange	TX
38	Lockheed Shipbuilding (formerly Puget Sound Bridge & Dredging)	1987	Seattle	WA
39	Long Beach Shipbuilding (formerly Craig SB)	1943	Toledo	OH
40	Manitowoc Shipbuilding	1972	Manitowoc	WI
41	Marietta Manufacturing	1962	Point Pleasant	WV
42	Maryland Shipbuilding & Dry Dock (formerly Globe SB)	1976	Baltimore	MD
43	Merrill-Stevens Engineering (later Jacksonville Shipyards)	1953	Jacksonville	FL
44	Moore Dry Dock (formerly Moore SB)	1956	Oakland	CA
45	New York Shipbuilding Company	1967	Camden	NJ
46	Peterson Builders (formerly Peterson Boat Works)	1997	Sturgeon Bay	WI
47	Pusey & Jones	1946	Wilmington	DE
48	Seatrain Shipbuilding (formerly New York NSY)	1979	Brooklyn	NY
49	Southern Shipbuilding (formerly Canulette SB)	1986	Slidell	LA
50	Sun Shipbuilding & Dry Dock Company	1983	Chester	PA
51	Tacoma Boatbuilding	1989	Tacoma	WA
52	Tampa Shipbuilding (TASCO)	1946	Tampa	FL
53	Tampa Shipyards (later Tampa Bay Shipbuilding)	1990	Tampa	FL
54	Todd Galveston (formerly Gray's Iron Works)	1986	Galveston	TX
55	Todd Houston (formerly Brown Shipbuilding)	1982	Houston	TX
56	Todd Los Angeles (formerly Los Angeles Shipbuilding)	1989	San Pedro	CA
57	Todd Tacoma (formerly Sea-Tac Shipbuilding)	1946	Tacoma	WA
58	Welding Shipyards	1950	Norfolk	VA
59	Western Pipe & Steel San Pedro	1947	San Pedro	CA
60	Western Pipe & Steel South San Francisco	1946	South San Fran.	CA